From 4a6e602c9419cc5ed464343b2373c7fe86fb89d6 Mon Sep 17 00:00:00 2001
From: Benjamin Bouvier <public@benj.me>
Date: Thu, 11 Feb 2021 17:34:56 +0100
Subject: Allow automatically detect the rustc-src directory (fixes #3517).

If the configured rustcSource is set to "discover", try to automatically
detect a source from the sysroot rustc directory.
---
 crates/project_model/src/cargo_workspace.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'crates/project_model/src/cargo_workspace.rs')

diff --git a/crates/project_model/src/cargo_workspace.rs b/crates/project_model/src/cargo_workspace.rs
index f47898b9b..1d8d34a0b 100644
--- a/crates/project_model/src/cargo_workspace.rs
+++ b/crates/project_model/src/cargo_workspace.rs
@@ -44,6 +44,15 @@ impl ops::Index<Target> for CargoWorkspace {
     }
 }
 
+/// Describes how to set the rustc source directory.
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum RustcSource {
+    /// Explicit path for the rustc source directory.
+    Path(AbsPathBuf),
+    /// Try to automatically detect where the rustc source directory is.
+    Discover,
+}
+
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct CargoConfig {
     /// Do not activate the `default` feature.
@@ -64,7 +73,7 @@ pub struct CargoConfig {
     pub no_sysroot: bool,
 
     /// rustc private crate source
-    pub rustc_source: Option<AbsPathBuf>,
+    pub rustc_source: Option<RustcSource>,
 }
 
 pub type Package = Idx<PackageData>;
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